Photocomposing machine

ABSTRACT

A photocomposing machine especially adapted for display work. The machine employs a film holder that is horizontally disposed and movable along two coordinate axis. A layout sheet viewable by the machine operator can be placed on the upper side of the film holder so that latter can be positioned in accordance with the requirements of the copy to be produced as indicated on the layout sheet.

[ Aug. 7, 1973 United States Patent [1 1 Debus et al.

3,008,392 11/1961 Mann.....................................95/4.5

[ 1 PHOTOCOMPOSING MACHINE 3122,075 2/1964 Klyce. 2,725,803 12/1955Inventors: Karl Debus; Karl-Jiirgen Debus,

both of Bad Homburg v. d. 11.; Eberhard Mohr, Langenselbold, of GermanyPrimary Examiner-John M. Horan Att0rneyWil1iam P. Keegan [73] Assignee:Mergenthaler Linotype Gmbh,

Frankfurt am Main, Germany July 15, 1971 Appl. No.: 162,999

ABSTRACT [22] Filed:

A photocomposing machine especially adapted for dis- [30] ForeignApplication Priority Dam play work. The machine employs a film holderthat is July 16 1970 horizontally disposed and movable along two coordi-Germany.................. P 20 35 313.3

nate axis. A layout sheet viewable by the machine operator can be placedon the upper side of the film holder so that latter can be positioned inaccordance with the g 5 requirements of the copy to be produced asindicated on the layout sheet.

References Cited UNITED STATES PATENTS 10 Claims, 17 Drawing FiguresPATENTEU H975 7 3,750,554

' SHEET '010F 1'1 PATENTED A 7 I975 sum 02 0F 11 PAT ENTED 719753750554.

sum 03 [1F 11 PATENTED 5 3,750,554

' sum nu'nr11 PHOTOCOMPOSING MACHINE This invention relates tophotocomposing machines, and especially to such machines intended fordisplay composition as distinct from text composition.

Photocomposing machines available in the commercial market at thepresent time generally are relatively high speed tape operated machinesbetter utilized to produce normal text composition. Because of the easewith which large point size images of characters can be obtained throughoptical magnification such machines are also used to produce displaymaterial. However, the use of such machines for display work isinefficient so far as the machines are conceived since they could beproducing a greater quantity of text material if there utilization wasrestricted to such work. Some small number of photo-composing machinesmay be considered display machines, but they are generally slowersimpler versions of text machines.

It is the object of the present invention to provide a photocomposingmachine that is particularly adapted to the production of display oradvertising material.

Thus, it is the aim of the present invention to provide a photocomposingmachine of the aforementioned kind suitable for multiple typographicaljobs such as the setting of forms, tabular matter and other jobbingwork, especially to a layout. Said photo-composing machine willdistinguish itself by having a rapidly and accurately operableadjustment device for the record support for set-wise transport afterexposure of the letters. For this purpose, it is desired that bothmanual and automatic transport of the cassette containing the recordsupport be possible with little effort. In order to meet such exactingtypographical requirements, the cassette should reliably be stopped inits preset position when the feed motion according to the set value ofan exposed sign is completed, and should be secured against unintentional displacement in manual operation. For manual adjustment, apreferably direct contact between the adjusting elements to be operatedfor the cassette and a layout sheet is desired, so that the recordsupport can be adjusted rapidly and perfectly also by relativelyunskilled operating personnel. In the case of adjustment by hand it isimportant that the movement of the record support be convenientlycoordinated with the adjusting elements and that, as with the automatictransport, the mechanism be of small mass so that it can readily bemoved and stopped. And the place of exposure of the hidden recordsupport and, preferably, the exposed sign should be controllable. Thecompositor shall be afforded an opportunity of orienting himself aboutthe point at which the record support is adjusted and about what hasbeen composed. In addition to these advantages, a great flexibility alsoin regard to thetype sizes and type founts and a good accessibility ofthe layout as well as of the record support are desired. Despite theversatility of this photo-composing machine, it shall be possible toachieve a relatively high composing speed at small expenditure.

The above features are obtained in a photocomposing machine of theaforementioned type having a cassette opened toward the bottom forexposure, in which the record support is spread out horizontally and istransportable with a cassette carriage in line direction by a thrustmagnet which is automatically slidable in only one plane and with astroke corresponding to the set width value of the character beingexposed.

Moreover the cassette carriage is supported for easy motion on a slidewhich is movable transverse to the line direction, and holding magnetsare provided for locking the cassette carriage and the slide after theyare positioned where desired. The cassette carriage and the slide areeach connected with an adjusting ruler and the adjusting rulers,cassette carriage and the slide can be moved relative to a stationarylayout sheet which can be secured in a plane above and parallel to thecassette.

Due to the fact that the cassette carriage and its slide are mounted insuch a way as to minimize friction and permit easy movement of thecassette carriage and the slide, (this is possible because holdingmagnets are used when it is desired to arrest these elements andmaintain them in the arrested position) manual adjustment of thecassette is substantially facilitated if the electro magnets for therespective direction of motion are deenergized. It is then possible toposition the record support at any desired point of exposure by shiftingthe adjusting rulers in two directions in vertical relation to eachother. This adjustment can be effected most accuratelysince theadjusting rulers rest directly against the layout without disturbing theview of the letter to be composed or the'like, and since the shifting ofthe adjusting rulers on the layout effects a corresponding shifting ofthe record support. Thus, neither a parallax correction nor atransmission ratio between the adjusting rulers and the cassette need betaken into consideration. Consequently, the record support can rapidlyand accurately be positioned manually to that point which, according tothe layout, is assigned to a characteristic point of an em-quad of theletters. The cassette carriage and the slide are safely retained in theadjusted position by the energized holding magnets.

With the present photo-composing machine, also a very accurate,automatic feed of the record support according to the set values of theexposed letters in ensured. For this purpose, a feeding magnet forshifting the cassette carriage is energized after the holding magnet ofthe cassette carriage is deenergized. When the thrust magnet has coveredapath according to the set value of the exposed letter, it is locked inthis direction until the momentum of the cassette has been absorbed andthe cassette arrested at the desired point. Accordingly, the slide ofthe cassette does not coast uncontrollably far, which would reduce theprecision of adjustment, although the friction between the slide and theguide elements is kept low. Due to the near frictionless support of thecassette and its slide, a relatively small driving power and lightweighttransmission elements will be sufficient. The design of thephoto-composing machine is, furthermore, substantially simplified by thefact that the thrust magnet is movable in one single plane only, inwhich it takes along'the cassette in line direction from a fixedstarting point up to a variable end point, returning into its startingposition after the cassett is locked in place by energization of theholding magnet.

Since the layout is attached above the record support, and since therecord support is exposed from below, the spacing between the layout andthe record support may be very small because merely the supporting platefor the layout is arranged between them. Although the cassette with therecord support and the layout are superposed closely, the cassette caneasily be reached from the top of the photo-composing machine, e.g.,when the compositor pushes the cassette next to the point of support ofthe layout. Operation of the photo-composing machine is substantiallyfacilitated by the fact that all essential elements can be handled bythe compositor without his having to leave his workplace for thispurpose. The compositor can conveniently overlook and control theadjustment of the photo-composing machine, especially of the adjustingrulers, from the same position. All of these advantages are achieved bythe arrangement, guide and connection to the automatic and manualfeeding means of the eassette and by the arrangement of the cassettewith respect to the layout and the projection equipment of the letters.

The driving mechanism for the letter-by-letter feed comprises a drivingelement for driving an electromagnetic counting-value adjustment devicewith a scanning rod which is automatically slidable according to therelative set width of the exposed letter and which is carried to amechanical multiplier for alowance for the type size, and the mechanicalmultiplier is meshed with a connecting rod connected with the magnetcarriage. For all type sizes in which a letter can be composed it is,thus, only necessary to store one single counting value assigned to theletter in the magazine and the need for a special counting magazine forall type sizes is eliminated. It is thus possible to transport thecassette in accurate and very rapid, successive steps. The insignificanterrors eventually occurring upon shifting the scanning rod will bereduced for smaller type sizes, whereas inaccuracies with larger typesizes are, anyhow, hardly noticeable. The feed of the scanning rod takesplace very rapidly since it is reliably braked at the end of its path ofmovement by spacers still to be described. The mechanical multiplier ischaracterized in that it converts the path given by the scanning rodinto a stroke of the magnet carriage corresponding to the type sizeduring a fixed time interval. Consequently, the speed at which themagnet carriage moves is altered with the larger type size, and thecomposing speed is, thus, constant for all type sizes.

The present photo-composing machine is designed with the characteristicfeature that the scanning rod is slidably supported in a guide blockwhich is movable forward and backward by a driving element. According tothe relative set width value of the exposed letter, adjustable spacersare arranged opposite one face of the scanning rod or of a scanning pinsecured to the scanning rod. By this arrangement of the scanning rodwithin the guide block, a positive coupling between the driving elementand the scanning rod for a shifting movement is formed. The path ofshifting is limited by the adjustable spacers. Consequently, the guideblock can cover a constant stroke independent of the letter. Thescanning rod driven by the guide block is stopped according to thespacers adjusted as required by the respective set width value. Due tothe positive connection of the scanning rod to the guide block, it istaken back into its starting position at the end of a movement ofstroke. Due to the safe stoppage of the scanning rod at the point of itsmaximum deflection for the respective letter, the speed of the guideblock for achieving a high composing capacity can be chosen relativelyhigh.

The photo-composing machine is, most favorably, designed in such amanner that the spacers are movable in the direction of the scanningrod, that the thickness of the spacers is graduated according to theseries 1, 2, 4, 8, 16, 32, and that combinations of the spacers areinsertable into the path of motion by lifting magnets in such a mannerthat they will be in tandem, and that the total thicknesses of theinserted spacers will equal the relative set width of the last exposedletter width. Thus, a large range of adjustment can be covered withsensitive subdivision. The spacers can be operated in parallel so thattheir adjustment is effected rapidly.

To achieve a simple and accurate adjustment for all spacers, anadjusting screw against which the spacers can be pressed by means of thescanning rod is provided on the side of the spacers averted from thefront face of the scanning rod. Due to the aforementioned flexiblesuspension of the spacers in axial direction of the scanning rod, theadjusting screw is effective for all set values.

Another variant of the counting-value adjustment device lies in that thethickness of the spacers is graduated according to all possible relativeset width values (counting values), and in that the spacers arecircularly fixed on a rotary table which is rotatable in such a mannerthat one spacer each will get into a position opposite the front face ofthe scanning pin according to the relative set value of the exposedletter.

A pressure spring which is arranged between the front face of the guideblock and a ring secured on the scanning rod and which is slipped overthe scanning rod, serves for a suitable embodiment of the positiveconnection between the scanning rod and the guide block, whereas adriving ring is fitted on the scanning rod opposite the rear face of theguide block. The starting position of the scanning rod opposite thescanning block is determined by the driving ring. The pressure springpresents a safely guided, compactly arranged connecting element formaking the frictional connection. Furthermore, it is desirable that amotor coupled with a cam disc serves as the driving element for theguide block, and that the cam disc is pressed against a roller supportedon the guide block by means of a return spring. With this arrangement,the acceleration of the guide block with the scanning rod and of theelements connected with the scanning rod, particularly of the mechanicalmultiplier and of the cassette, is smoothly effected.

In order to permit manual displacement of the magazine corresponding tothe position of a letter given on the layout, the photo-composingmachine is most advantageously designed in that manner that the oneadjusting ruler is directly connected with the cassette carriage, andthat a cable is utilized for connection of the slide with the otheradjusting ruler, one end of the cable being connected to the slide andthe other end to the other adjusting ruler. Upon a displacement of theadjusting ruler connected to the cassette carriage, the record supportwill be moved in the same direction of motion as the adjusting ruler.Accordingly, while the motion of the one adjusting ruler is transmittedin the same direction to the cassette, the motion between other theadjusting ruler and the cassette is reversed. As the first mentionedadjusting ruler is moved from left to right in normal reading direction,the cassette will, likewise, move from left to right. Since the axis ofthe optical system is fixed, the line is exposed on the record supportfrom right to left when viewed from the top, and from left to right whenviewed from the bottom. Due to the reversal upon actuating the secondadjusting ruler, the cassette moves from the front to the rear of themachine when the adjusting ruler is pulled to the compositor in theusual line sequence, and the same sequence of the lines appears on therecord support.

According to an improvement of the photocomposing machine, the easymovability of the cassette carriage and of the slide is utilized alsofor automatic line drawing. For this purpose, the present photocomposingmachine has the features that the cassette carriage and the slide can beautomatically transported from a rest position into an end position, atoption, for line drawing.

It is possible with the present photo-composing machine, by simplyexchanging the ruling copies, to expose lines of practically any lengthand of freely selected starting and end points and with practically anythinkable structure, e.g., interruptions, dash-and-dot lines, and thelike. Since exposure of the record support will not commence until theslide has been accelerated to a uniform speed, all points of the linewill be exposed with equal intensity so that undesirable fluctuations ofthe line thickness are definitely avoided.

In a further embodiment of the photo-composing machine, the cassettecarriage is connected with a cable line, and this cable line as well asthe cable line connected with the slide can, optionally, be coupled witha motor, thereby achieving a smooth transmission of the motor movementonto the slides at little expenditure.

A further design of the'photo-composing machine is distinguished in thatrectangular matrices showing a few superimposed letters are laterallyprovidedwith two replaceably attachable matrix centering pins forattachment on a cleahshaped holder, and in the each matrix, in additionto the letters, bears the assigned set values in the form ofmechanically readable marks. This permits extremely versatile andflexible employment of the photo-composing machine since rarely usedspecial signs can also be employed in case of need without having toreplace the entire magazine. Since on each matrix the relevant setvalues are firmly assigned to the letters, a perfect control of the feedof the record support is absolutely ensured. As a whole, thisphotocomposing machine thus offers versatility of the hand compositionof type, but, with a considerably higher speed and accuracy. I

A control of the exposed letters is most suitably achieved in that amagazine support carrying the cleatshaped holder is coupled with a typeselection device of a recording apparatus. This enables the compositorto convince himself at any time about which portions of a layout he hasalready composed.

In an advantageously simple embodiment, the recording apparatus featuresan index wheel fitted with rubber types which is connected via a cableline with a slide and guide angle pivoted at the magazine support, withan ink roller resting against the index wheel, and a paper strip forcontrol printing which can be pressed against the index wheel.

Furthermore, it is desirable that the index wheel be slidable in axialdirection and be connected with a reversing linkage so that one and thesame type of the index wheel can be printed according to selection ofthe standard type or a display type with the reversing linkage on thepaper strip in different positions. This provides the compositor withinformation regarding the standard or display type in which the letters,which are readable on the paper strip, have been composed.

Features and advantages of the present invention may be gained from theforegoing and from the description of a preferred embodiment of theinvention which follows.

In the drawing:

FIG. I is a diagrammatic total view of the close-order photo-composingmachine;

FIG. 2 is a diagrammatic partial view of the interior of thephoto-composing machine, i.e., the support of the cassette, the meansfor automatic feed in line direction and the ruling arrangement;

FIG. 3 is a view of the front of the cassette carriage;

FIG. 4 is a view of the front of the cassette, partly in section;

FIG. 5 is the electromagnetic counting-value adjustment device shown indetail as a diagrammatic representation;

FIG. 6 is a detailed perspective view of the mechanical multiplicator;

FIG. 7 is another perspective partial view of the interior of thephoto-composing machine, i.e., the support of the magazine carrier andthe arrangement for selection of a letter;

FIG. 8 is a partial view of the magazine support with matrices;

FIG. 9 is a diagrammatic representation of the transmission elements fortype size adjustment;

FIG. 10 is a side elevation of the optical system, of the means forcentering the magazine support and of the selector system forStandard/Display Type;

FIG. 11 is a diagrammatic representation of a detail of the selectorsystem for Standard/Display Type;

FIG. 12 shows the clear-recording apparatus in a side elevation;

FIG. 13 shows the clear-recording apparatus in a longitudinal section;

FIG. 14 shows a cutaway portion of a paper strip printed with theclear-recording apparatus;

FIG. 15 shows an electric switching arrangement for control of thephoto-composing machine for feed in line direction;

FIG. 16 shows an electric switching arrangement for adjustment of theelectromagnetic counting-value adjustment device, and

FIG. 17 shows an electric switching arrangement for line transport, andthe ruling arrangement.

FIG. 1 illustrates the exterior of the photoacomposing machine. Theinterior parts of the photo-composing machine are enclosed by a nearlydesk-type casing with a supporting plate 1 and two bases-land 3. An area4 of the supporting plate is provided for accommodating a layout sheet.The layout sheet is a marked up copy of the desired displayadvertisement and it can be aligned and fixed in this area withfasteners, not shown. Slidable adjacent to this area 4 is an adjustingruler 5 which is movable in the direction of the longitudinal edge,i.e., in the direction of line composition. A second adjusting ruler 6which is likewise lying on supporting plate 1, is slidable in verticalrelation to the adjusting ruler 5 along a narrow side of thephoto-composing machine. Ball handles 7 and 8 serve for manuallyshifting each of these rulers,,respectively. For reading the measures oftypographical position of each ruler, there are provided measure scales9 and 10 in the shifting range of the adjusting rulers. Adjacent to thearea 4 for the layout sheet there are, furthermore, provided a rulingcopy 1 l for the line direction and a ruling copy 12 for the directionin vertical relation hereto, which are suitable for being interchanged.Slidable along each ruling copy there is supported a test head 13 or 14,respectively, which, as will be shown, are connected with a cassette forthe record support inside the photo-composing machine the same as theadjusting rulers. For introduction of the cassette into thephoto-composing machine, a flap 15 is cut out of the supporting plate 1.Between the two bases 2, 3, on the side assigned to the workplace of thecompositor, there is slidably supported a selector and release lever 16on a guide bar 17 in parallel with the longitudinal edge of thephoto-composing machine. The letter selected with the selector andrelease lever 16 is reproduced on the indicating panel 24, and theexposed sign is printed on a paper strip 19 with the clearrecordingapparatus 18 arranged on the right-hand side, partly on the supportingplate. This apparatus 18 will be more fully described hereinafter. Onthe front of the left base there can be seen a changeover button 20 forchanging over from standard to display type, below which a control desk21 for adjusting the desired function of the photo-composing machine isfixed. On the front of the right-hand bracket there is provided anadjusting wheel 22 for point size adjustment of the type image. From theright-hand side of the bracket 3 there is projecting an adjusting screw23 for changing the letter spacing. A strip 24 arranged above theselector and release lever 16 reproduces the letters existing on themagazine support inside the photo-composing machine. The compositor canread the letter selected in each case from this strip. All elementswhich make a permanent control by the compositor desirable, espe' ciallythe layout arranged in the area 4 with respect to the adjusting rulers5, 6, and the paper strip 19, as well as the essential operatingelements, i.e., the adjusting rulers, the selector and release lever 16,the changeover button 20, the control desk 21 and the adjusting wheel 22for point size adjustment, are arranged in such a manner that thecompositor can conveniently overlook and actuate these control andadjusting elements from his workplace in front of the photocomposingmachine. He need not leave his workplace for interchanging the recordsupport, since the cassette accommodating the record support can readilybe removed through the flap 15. Due to the fact that all adjustingelements, particularly those for cassette displacement, can be operatedwith little effort, a high productivity for the layout set will also beachieved for difficult composing work.

In FIG. 2, a frame of the photo-composing machine is designated as 26.The frame carries a pair of guide 7 bars 27 which serve for supporting aslide 28 and, indirectly, the cassette carriage 29. The slide 28, forits part, consists of two guide bars 30 running in parallel which areconnected with each other at their ends by one each flange 31 or 32,respectively. Sunk into the flanges are slotted sliding sleeves whichare adjustable for easy-motion guide of the slide on the guide bars 27.For locking the slide 28, there is secured a holding magnet 34 on across traverse 35 of the frame, said magnet opposing a plane portion 36at the flange 31.

The cassette carriage 29 which is slidably supported on slide 28 is,substantially, composed of a frame 37 to which two easy-motion slidingsleeves 38 are fitted on the side facing the viewer, and a roller 39 onthe opposite side. (See FIG. 3) A cassette 40 with a record support canbe loaded from the top into the frame of the cassette carriage, whichrecord support can be exposed from below through the opening of theframe. The design of the cassette 40 with its frame 280 foraccommodating a record support 28ll for a sheet of sensitized materialfollows from FIG. 4. Underneath the record support there lies a plate282 of a lightweight, glass-like plastic. The record support can becovered by means of a slide 283.

A cable line 41 guided via two cable pulleys 42, 43 serves for drivingthe slide 28 for transport in lines or for feed in transverse relationto the line direction, respectively. A second slide 44 is connected withthe first slide 28 and can be easily moved in parallel therewith along aguide rail 45. It carries the adjusting ruler 6 and the test head 14.For feeding the slide 28 in vertical relation to the line direction, thecable pulley 43 is coupled via a magnetic clutch 222 with a steppingmotor 215, unless the feed is effected by manual shifting of theadjusting ruler 6.

The adjusting ruler 5, which is firmly connected with the cassettecarriage 29, as is the test head 13 and thrust rail 46 serve fortransport of the cassette carriage 29 in line direction. The adjustingruler 5' is supported on the frame 26 by means for a roller 47. Anadditional reenforcing member is designated 48. The drive of thecassette carriage is effected via a cable line 49 which is guided viatwo cable pulleys 50 and 51. A magnetic clutch 221 and the steppingmotor 215 are used for driving the cable pulley 50. As distinguishedfrom the cable line 41, the cable line 49 has the same strand connectedwith the cassette carriage and the associated test head.

FIG. 3 reveals in detail in which manner the thrust rail 46 is meshedwith the cassette carriage. The underside of the cassette carriage 29has a sliding bar 52 sunk into it in parallel with the narrow side ofthe carriage. On the sliding bar, a sliding sleeve 53 secured on thethrust rail 46 is easily movable. The thrust rail is guided by means oftwo small rollers 54 along a guide bar 55. The guide bar is fastened tothe traverse 35 in FIG. 2. With this arrangement it is achieved that thecassette carriage can be transported in line direction by means of thethrust rail which is moving in the same path of motion, but that, inaddition, it is also movable in transverse relation to the linecomposing direction with very little effort.

It also appears from FIG. 2 that underneath rail 46 there are provided aholding magnet 56 and a thrust magnet 57. The holding magnet 56 isfitted to the end of a pair of magnet carriage rails 58'which is securedto a traverse 59. The magnet carriage 60 carrying the thrust magnet 57can be shuffled on the magnet carriage rails. The magnet carriage iscoupled with the outlet of a mechanical multiplier 62 via a connectingrod 61. A block 63 into which the thrust rail will slide when thecassette carriage is moved relatively far to the right can be recognizedabove the multiplier on the frame.

A geared motor 64 is provided as the driving element for automatic feedin line composing direction. The geared motor is in connection, notshown in FIG. 2,- with an electromagnetic counting-value adjustmentdevice 65 (FIG. 5) from which a scanning rod 66 slidable according tothe relative set value of the exposed letter is projecting. A feed lever67 which is unilaterally fitted to the frame and a link rod 68 serve fortransmission of the movement of the scanning rod onto the mechanicalmultiplier (FIG. 6) in which the type size is allowed for.

The adjusting screw 23 for subtracting constant values from the feedingmovement is provided adjacent to the mechanical multiplier 62.

On the right-hand side of the frame there is arranged a limit switch 220at the block 63 in such a manner that it will be in the path of motionof the thrust rail 46.

FIG. illustrates the electromagnetic counting-value adjustment device indetail, the casing surrounding the counting value adjustment device asper FIG. 2 being removed and, in addition, some parts which wouldinterfere with the view of essential elements of the counting-valueadjustment device being broken away. The counting-value adjustmentdevice is connected with the geared motor 64 via a toothed belt 69 whichserves for driving a cam disc 70 supported on a shaft 72 which is sunkinto the carrier plate 71. Adjacent to the cam disc there is provided aslidable guide block 73 into which slide rails 74 connected with thecarrier plate are sunk. The guide block is pulled away from the viewerby means of a return spring 74a, so that a roller 75 supported at theguide block will always rest against the cam disc. A scanning rod 66 issunk into a bore of the guide block running in parallel with the sliderails. Under the force of apressure spring 77 which rests against theguide block on the one hand, and against a ring 78 secured to thescanning rod on the other, the scanning rod is pushed forward as long asno other forces are acting on it. On the other hand, the scanning rod isnot shown in its rest position in FIG. 5, in order to show the ring 79which butts against the rear face of the guide block in the restposition. At the rear of the scanning rod, which is illustratedbroken'away, there is provided an actuating element 80 of a set ofcontact springs 81. Another actuating element 82, which interacts with amicroswitch 83 arranged on the carrier plate, is attached to the guideblock.

For counting value adjustment there are provided spacers 84 through 89,which can be brought into the path of motion of a scanning pin 90secured at the front face of the scanning rod 66. The thickness of thespacers 84 through 89 is graduated according to the binary series I, 2,4, 8, I6, 32. All spacers are movable in the direction of,motion of thescanning pin so that they can be pressed against an adjusting screw 76which is sunk into a carrier plate 91. For this purpose, the heaviergauge spacers 84, 85 are fitted to one each pair of toggle joints 92 or93, respectively. The lighter gauge spacers 86 through 89 are providedat the outer ends of leaf springs 94 through 97. In order to design thepairs of toggle joints so as to be engageable without collision, eachpair of toggle joints is pulled by a spring, e.g., 98, against a tappetroller 99 or 100, respectively. Each pair of toggle joints 92 or 93,respectively, and each of the leaf springs 94 through 97 is respectivelyattached to one of the angle levers 101 through 106. To the angle leveror 102, respectively, there is furthermore fitted opposite each pair oftoggle joints a retaining pin 107 or 108, respectively, which isarranged for supporting the roller 99 or 100, respectively, and forfitting of the associated spring. Three angle levers are separatelyswingable about each axis 234 and 235, respectively, which are sunk intothe carrier plate 91. For the swinging of angle lever, one each liftingmagnet 109 through 114 is pivoted to each lever. Furthermore, onepressure spring is acting upon each of the toggle joints, of whichpressure springs only the ones designated as 115 through 117 are shownin the drawing, although equal pressure springs are assigned to anglelevers 102, 104 and 106.

As is immediately obvious from FIG. 5, the electromagnetic actuatingelements and transmission elements of the spacers 84, 86, 88 arearranged in an upper row, whereas the corresponding actuating elementsand transmission elements for the spacers 85, 87, 89 are grouped in anopposite, bottom row. In FIG. 5 there are illustrated all spacers in thepath of motion of the scanning pin 90, from which they would have beenswung out under the action of the pressure springs with magnetsde-energized. The spacers are arranged with spaces in relation to eachother which are always effective as long as the scanning pin does notrest against the spacers, so that these can, optionally, be swung intoor out of the path of motion of the scanning pin without hindrance. Aswill be described later, the output quantity of this electromagneticcounting-value adjustment device is a path displacement of the scanningrod 66, the rear of which is supported in the central range of the feedlever 67 as shown in FIGS. 2 and 6. As is furthermore obvious from FIG.4, the feed lever 67 is connected with the mechanical multiplier via thelink rod 68, the casing of which multiplier being removed in FIG. 6.

In detail, the link rod 68 is pivoted to a slide 119 which is supportedto be slidingly movable in a carrier block 120 secured to the frame inthe direction of shifting of the scanning rod. The slide is guided on asliding rod 122 sunk into the carrier block by means of a sliding sleeve121 fitted to the slide. Further guidance is imparted to it by the guidebolt 123 which is arranged in the carrier block and against whichrollers 124 are resting; the rollers are rotatably mounted on slide 119.A forced guiding element 127 which is swingable about the screw 126 isconnected with slide 119 via a con necting flap 125. The screw, thus,represents the swivel axis of the forced guiding element. Fromthe'interior of the forced guiding element 127 there is recessed aslideway with two sides 128, 129 running in parallel with each other.The slideway features an enlargement 130 at the front end in way of side129. In the slideway there is provided a forced guiding roller 131 whichis pivoted on the tie rod 61 for the magnetcarriage 60. For facility ofinspection, the forced guiding roller is shown outside its restpositionat the front end in way of the enlargement 130 in FIG. 6. On theopposite end of the forced guiding element 127 there is supported aguide roller 132. This guide roller is guided by a' connecting linkguide element 133 in parallel with the slide 119. The connecting linkguide element is movable in transverse relation to the guiding directionof the guide roller 132 opposite thecarrier block 120. Theshifting pathis determined by the fitting of a roller 134 against a slope of the lensholder 135. The connecting link guide element 133 is constantly pressedin the direction toward the slope by a spring which is not shown in thedrawing, whereas a spring 136 is fitted to the connecting rod 61 whichpulls the connecting rod in the same direction. Therefore, the forcedguiding roller 131, is normally lying at the side 128 of the slideway.Moreover, the starting position of the connecting rod can be determinedby means of the adjusting screw 23 which can be turned round opposite athreaded flange 138 and which carries the connecting rod along to theright via a ring, so that the forced guiding roller moves from the side128 of the slideway to the enlargement 130.

FIG. 7 shows another partial view of the interior of the photo-composingmachine, especially the means for selection of a letter to be exposed.For facility of inspection, practically all parts and devices shown inFIG. 2 for shifting the cassette carriage have been omitted in thisrepresentation. In FIG. 7 it is indicated that the changeover button 20for changing over for standard to display type as well as the adjustingwheel 22 for type size adjustment are supported in frame 26. A guide bar143 on which a fork 144 can be moved is provided in parallel with thefront side of the frame and is arranged thereon. A depressable, curvedselector and release lever 145 is fitted in the fork. At its end remotefrom the front side, the selector and release lever carries a drop-inpin 146 for engagement into a stop rod 147 which is toothed in parallelwith the guide rod on the back. The fork is coupled via a slide andguide angle 148 with a magazine support 149. For this purpose, a fork150 is fastened to the magazine support, and the slide and guide angleengages with this fork. Furthermore, a roller 151 which rides on acarrier bar 152 is supported in the fork 150. Opposite roller 151 twosliding pieces 153 with which the magazine support can be moved oppositea guide bar 154 are secured to the magazine support. The guide bar canbe swung nearly in a horizontal plane by means of a lifting linkage 155,whereas the carrier bar 152 is movable in substantially verticalrelation via a pair of centering rods 156. The support of the liftinglinkage of the centering rod is held by the main carrier 140 which canbe adjusted opposite two vertical guide columns 141, 142. For changingover from standard to display type, the changeover button 20 isconnected with a shifter rod 158 via a reversing linkage 157.

As is obvious in detail from FIG. and 11, the shifter rod 158 engageswith a link fork 159 which is part of a gate 160 movable in parallelwith the magazine support. The gate slides within the link bracket 161.It features three bearing areas 162, 163, and 164 which are connected byinclined surfaces. On one of these bearing areas there is resting arunner 165 which is pivoted in the lifting linkage 155. It can be notedfrom FIG. 10 that the magazine support 149 can be pushed into one ofthree positions in approximately the same plane via the lifting linkage155 connected with it and being swingable with shaft 239, i.e.,according to the bearing areas 162 through 164 at which the runner 165is adjusted. Upon shifting the magazine support in the horizontal plane,the roller 151 will slide on the carrier bar 152. Under the action of atension spring 166 between the lifting linkage and the main carrier, therunner will always be pressed downward onto the gate 160, so that themagazine support tries to take a position which is as far to the rightas possible in FIG. 10.

A cutaway portion from the magazine support is illustrated in FIG. 8 towhich reference will be made, before the centering device is explainedsubsequently on the basis of FIG. 10. It can be noted from FIG. 8 thatnarrow, rectangular strips which may be of glass or of a transparentplastic with similar optical properties are provided as matrices 167. Ateach end ofa matrix there is inserted a centering pin 169. In the middleof each matrix there is provided a letter in the standard roman face,below it the same letter in italic face, and above it the same letter inmedium face. Below each letter a mark is laid down on the matrix, givingthe associated relative set width value in the form of points. Thesemarks 168 are coded to a binary system. A cleatshaped holder 170 for thematrices consists of two per forated rails not designated in detailwhich are connected by a guide plate which, likewise, is not designated.The matrices can be inserted individually into one each pair of holes ofthe cleat-shaped holder. The cleat-shaped holder, for its part, isslipped over cylindrical pins 171 of the magazine support 149 of whichmerely the right-hand cylindrical pin can be seen in FIG. 8.

For point size adjustment, the main carrier 140 and the lens holder 176can be adjusted either jointly, or independently of each other. For thispurpose, there are provided two cam discs 183 or 184, respectively,according to FIG. 9, which can be turned by actuating the adjustingwheel 22 (FIG. 7) via shaft 185 and cable lines 186, 187. The cam disc183 is connected via a roller 188 resting against its circumference andan adjusting lever 189 fitted to the frame with a hinged adjusting screw1900 which is pivoted on the lens holder 176. The lens holder can, thus,be moved along the guide bolt 191 together with its lens guide column190. In order to achieve a relative movement of the matrix opposite thelens in a certain dot size range, the second cam disc 184 is broughtinto connection with an approach angle 194 attached to the main carrier140 via a roller 192 and an adjusting lever 193. This permits variationof the distance between the main character carrier and all elementsfitted thereto, especially of the inserted matrix on the one hand, andof the cassette carriage with the record support, on the other.

It can be noted from FIG. 10 that the centering pins 169 of the matrixselected in each case can be pressed into a centering plate 172 which,for this purpose, is provided with three juxtaposedcentering holes 173according to the three possible positions of the magazine support inthis direction, and with a centering slot 174. In the centered positionof the matrix as shown, magazine lifting magnet 197 in FIG. 15 isenergized, lifting the magazine support and, thus, the matrix holder viaroller 151, carrier bar 152, and centering rod 156. The centering plateis fitted to a centering plate support 175 which, for its part, isscrewed to the main carrier. A lens holder 176 is movable in bearings'17-! opposite the centering plate support 175, which bearings arearranged on the main carrier 140. In the optical axis of a lens 178fastened to the lens holder, a shutter 179 is arranged underneath thematrices, said shutter closing a lamp housing 180 in the optical axis.In a lamp housing provided at the main carrier, a lamp 181 and a mirror182 are discernible. FIG. 7 illustrates those elements which serve forcoupling the clear-recording apparatus 18 with the slide and guide angle148 and the selector and release lever 145. The coupling elements arethe cable line 240 which is guided via a cable pulley 241 and two guidepulleys 242 and 243.

The design of the control printer follows in detail from FIG. 12 and 13,the former showing a paper strip in the control printer. It can be seenfrom these figures that the cable pulley 241, an index wheel 245, amaga-,

zine paper roll 246, a driving mechanism 247 for the paper strip 19, anda swing-away ink roller 270 are carried by a sheet bar 244. The inkroller which is soaked with ink is constantly being pressed against therubber types 250 of index wheel 245 by means of a tension spring 271.

The index wheel 245 is positively connected with the cable pulley. Theouter rim 248 of the index wheel is interchangeable. It is positivelyretained on the index wheel by spring elements 249. Rubber types 250 onwhich the letters are embossed are sunk into the rim. The rubber typesare accommodated on the index wheel in such a manner that their sequencecorresponds with the origin of the matrices on the magazine support sothat, upon adjustment of a certain matrix, the corresponding rubber typewill get before the face 251 of the paper strip support. In axialdirection index wheel 245 is movable via its shaft 252 by means of alever 253 opposite the front side of the paper support. For thispurpose, the lever 253 which can be swung about the bearing 254 engagesat its opposite end into a groove 256 of shaft 252 by means of a pin255. The coupling of the lever 253 with the arrangement for changingover from standard to display type is not shown in the drawing; itengages with the lever at point 257.

The driving mechanism for the paper tape 19 features an electromagnet258 which is connected with a slide 261 via a pressure spring 259 and atwo-armed lever 260. The slide is movably supported within a guideelement 262, i.e., by means of rollers indicated by the referencesymbols 263. The slide is pulled to the left in rest position by aspring 264. It carries the remaining elements which are required forfeeding the paper strip, and the paper strip support having its frontside designated as 251. For transport of the paper strip this is passedbetween a driving wheel 265 with'a'rubber sheathing and a proof roller267. The driving wheel and the proof roller are supported on the slide.Connected with the driving wheel is a pawl wheel 266 with which an upperstop pawl 269 which is likewise supported on the slide, and a lower feedpawl 269 which is fixed opposite the slide are meshing. The pawls arepressed toward the center of the pawl wheel by means of springs notshown in detail. The paper strip is passed from the magazine paper roll246 between the slide and a guide element 272 via the front side 251 ofthe slide and onward between the proof roller 267 and the driving wheel265.

The electrical equipment of the photo-composing machine with itsassemblies which are essential for the functional sequence is describedon the basis of FIG. 15, 16 and 17. It is obvious from FIG. that thecontact 195 fitted to the selector and release lever is connected to theclear-recording apparatus 18 and to a setting input ,of a bi-stabletrigger 196. The setting output of trigger 196 is connected with amagazine lifting magnet 197 and the input ofa mono-stable trigger 198.The setting output of trigger 198 is carried via an OR gate 199 (thesecond input of OR gate 198 is the output of the AND member 218 in FIG.17) to an exposure magnet 200 for actuating the shutter 197. From theresetting output of the mono-stable trigger 198, a line branches off tothe resetting input of bi-stable trigger 196, and to the setting inputof a bi-stable trigger 201 and to the setting input of a bi-stabletrigger 202. The resetting input of the bi-stable trigger 201 isconnected to the set of contact springs 81, whereas the resetting inputof the bi-stable trigger 202 is connected with the microswitch 83. Thesetting output of the bi-stable trigger 201 is carried to the thrustmagnet 57; the holding magnet 56 receives current from the resettingoutput.

The setting output of the bi-stable trigger 202 is connected with thegeared motor 64.

FIG. 16 schematises the switching arrangement of the electromagneticcounting-value adjustment device. The counting values are graduatedaccording to the binary series I, 2, 4, 8, I6, 32. For each step of thecounting value there is provided the same assembly, of which only oneassembly is shown in FIG. 16. The assembly shown includes alight-sensitive element 203 which is in light-conducting connection withthe mark provided for a set width value of the centered matrix 167. Onthe outlet side, the light-sensitive element 203 is connected to thesetting input of a bi-stable trigger 204, the resetting input of whichis connected with the microswitch 83. The setting output of thebi-stable trigger 204 is carried to the lifting magnet 109. As alreadymentioned, one similar arrangement of a light-sensitive element and abi-stable trigger is available for the remaining lifting magnets through114, the centered matrix being located between the arrangement of thelight-sensitive elements and a light source 205.

The ruling device and the arrangement for line transport are shown inFIG. 17. The ruling device contains the test heads 13, 14 for horizontaland vertical lines in which each one light source'206 or 207,respectively, and, on the opposite side, one light-sensitive element 208or 209, respectively, are accommodated. Between the light source andthe-light-sensitive element there is respectively provided the rulingcopy 210 or 211, respectively. The ruling copy is in the form of astencil strip on which the light transmitting portion is coextensive inlength with the desired line or'rule. Each light-sensitive element isconnected via an intensifier 212 or 213, respectively, with an OR gate214 which is connected to the exposure magnet via an AND gate 218.

A stepping motor 215 which can be coupled, at option, via a magneticclutch 221 for the horizontal direction or a magnetic clutch 222 for thevertical direction with the respective cable pulley which is connectedwith the cassette carriage, serves for transport of the cassettecarriage during line drawing. The motor is connected to a pulsegenerator 216. For releasing the exposure of a line, resort is again hadto contact at the selector lever and the bi-stable trigger 196, see FIG.15. The resetting input of trigger 196 is connected to the limit switch220 in the path oflnotion of the thrust rail 46. The setting output ofthe trigger 196 is carried via a selector switch 217 to one or; themagnetic clutches 221, 222, at option. Furthermord'a line is conductedfrom the setting output of trigger196 to the AND gate 218 in the signalpath to the exposure magnet 219. The holding magnet 34 is connected tothe contact for. the horizontal direction of the selector switch 217 viaa switch not shown, and the holding magnet 56 is likewise, connectedwith a contact for the horizontal direction of the selector switch 217via a switch.

The contact 195 at the selector lever is, furthermore,

connected with the setting intake of another bi-stable trigger 226 via aselector switch 225 for selection ofthe mode of operation "LINE DRAWINGor the mode of operation LINE FEED. At a second contact of the selectorswitch 225 there is connected a starting switch 231. The resetting inputofvtrigger 226 is connected to the limit switch 220. Another connectionis carried from a comparator 227 to the resetting input. The settingoutput of the trigger 226 is connected with the pulse generator 216, inorder to connect or disconnect it according to its output signal. Fromthe pulse generator a line is carried to a multi-step counter 228, thesteps of which are connected with the comparator 227. On the other hand,the comparator receives signals from an input pushbutton 229 which iscoupled with the input member 230 for line drawing.

The operation of the photo-composing machine will now be described,first with regard to the adjustment of the record support to a desiredpoint of the layout, then to the exposure of characters and thetransport of the cassette in line direction, and thereupon the line feedand the line drawing.

It is supposed that a holder with matrices which bears the desired typesis slipped onto the magazine support 149. The index wheel 245 of theclear-recording apparatus 18 is adjusted in harmony with the arrangementof the types in the magazine. The cassette accommodating the recordsupport has been inserted into the cassette carriage 29.

A layout sheet has been laid in area 4 of the support plate 1. Theswitches to the holding magnets 34 and 56 are opened so that theadjusting rulers 5 and 6 can easily be adjusted in such a manner thatthe inner edges of the rulers will intersect at a certain point of theselected letter on the layout. This will, simultaneously, move thecassette carriage into the optical path of the device in such a mannerthat an exposure of the record support can be effected exactly at thatpoint which corresponds to the selected point of the layout. By closingthe associated switches, this position will be fixed by means of holdingmagnets 34 and 56.

Prior to the exposure of a letter, the adjusting wheel 22 must have beenadjusted to the selected type size. This will adjust the main carrier140 and the lens holder 176 according to the required scale ofreproduction via the cam discs 183, 184. At the same time, theconnecting link guide element 133 of the mechanical multiplicator isshifted via the slope 135 and the roller 134, which mechanicalmultiplicator will effect the correct feed of the record support in linedirection after exposure of the letter. According to the position of thechangeover button 20, the position of the magazine support 149 invertical relation to the line direction is determined via the reversinglinkage 157 and the shifter rod 158. Thus it is given whether a letterwill be laid down as standard roman, italic or medium. Then the magazinesupport 149 is moved in line direction on the carrier bar 152 and theguide bar 154 by shifting the selector and release lever 145 via theslide and guide angle 148, so that the proper matrix will get into theoptical path of the device. This adjusting movement is simultaneouslytransmitted onto the index wheel of the control printer via the cableline 240. The photocomposing machine is now ready for exposure of thedesired letter.

For exposure the selector and release lever 145 is depressed causing thedrop-in pin 146 to engage between two teeth of the stop rod 147 andcenter the selected matrix via the slide and guide angle 148 in theoptical path. As depressing of the selector and release leverprogresses, the contact 195 actuated by this lever will then be closed.This will adjust the bi-stable trigger 196 and energize the magazinelifting magnet 197. Under the action of force of the magazine liftingmagnet, the centering rod 156 will swing upwardly, one centering pin 169of the matrix will get into the centering slot 174, while the secondcentering pin 169 is pressed into a centering hole 173. This will alignthe matrix perfectly. In addition, the matrix will be pressed againstthe centering plate 172 under the effect of the centering rod.

Furthermore, the mono-stable trigger 198 will trip the exposure magnet200 by way of OR gate 199 in consequence of the signal going out fromthe bi-stable trigger 196. It is presupposed that the release will notbecome effective until after completion of the centering procedure.Since the lamp 181 is illuminated continuously during operation of thephoto-composing machine, the image formation of the letter on the recordsupport is effected by actuating the exposure magnet 200 and, thus, theshutter 179.

The duration of the pulse at the setting output of mono-stable trigger198 corresponds to the period of exposure time of the record supportsince lamp 181 is continuously illuminated in the lamp housing. Afterexpiration of the pulse duration, the bi-stable trigger 196 is reset,and the bi-stable triggers 201 and 202 are reset. This will switch offthe holding magnet to permit transport of the cassette in line directionand switch on the thrust magnet 57. At the same time, the geared motor64 which is connected with the electromagnetic counting-value adjustmentdevice will start.

During the exposure of the letters, the magnets 109 through 114 foradjustment of the spacers will be energized according to the relativeset of the selected letters since, during opening of the shutter, thelight-sensitive elements 203 will be subjected to a luminous fluxaccording to the marks of the letter as adjusted. Each light-sensitiveelement triggers bi-stable trigger 204 by which one of the combinationsof the magnets 109 through 114 is energized. Consequently, one orseveral spacers will be swung into the path of motion of the scanningpin 90 according to the marks, and the feed of the cassette carriagewill be limited in the following manner in one of the possiblegraduations of H72- units.

The guide block 73 is pushed forwardly in the direction towards thespacers against the tension of the spring 74a together with the scanningrod 66 and the scanning pin 90 under the effect of the cam disc restingagainst roller 75. During this phase of movement, the scanning rods andthe scanning pin are moved until the scanning pin strikes against thespacers, pressing these on the adjusting screw 76. After the scanningpin has run into resistance in such a manner, the guide block is firstadvanced still farther according to-the shape of the cam disc when arelative movement will take place between the scanning pin and the guideblock during which latter movement spring 77 will be compressed. As soonas segments of smaller radii of the cam disc 70 are again restingagainst the roller, the guide block will return into its startingposition by means of the return spring 75. The frictional connectionbetween the scanning pin and the spacers will become effective so thatthe scanning rod 66 can gradually take its normal rest position withinthe guide block again by the action of the pressure spring 77. At thatmoment at which the guide block is returning into its starting position,the microswitch 83 is actuating by element 82 at the guide block, andthe stepping motor comes at rest. The stepping motor thus drives the camdisc independent of the relative set of the exposed let-

1. A photocomposing machine intended especially for display composition,said machine comprising a fixed work station on which a layout sheet canbe mounted in view of a machine operator, a first ruler means locatedabove said work station and movable in a line composing direction, asecond ruler means located above said work station and transverse tosaid first ruler means and movable in a second direction transverse tothe linecomposing direction moved by said first ruler means, a filmholder mounted within the machine for movement in a line composingdirection and in a second direction transverse thereto, first meansconnecting said film holder directly to said first ruler means so thatsaid film holder moves in the same direction as said first ruler means,second means connecting said film holder to said second ruler means sothat said film holder moves in a direction opposite to that moved bysaid second ruler means, a font of characters to be imaged, each of saidcharacters having associated therewith machine readable markscorresponding to the width oF the character, means for manuallyselecting a character to be photographed, means for photographing acharacter selected from said font of characters, electro-mechanicalmeans for moving said film holder in a line composing direction indiscrete steps corresponding to character widths, means for connectingand disconnecting said film holder from said electro-mechanical movingmeans, and means for locking said film holder in a position to which ithad been moved.
 2. A photocomposing machine according to claim 1including a slide on which said film holder is mounted for movement in aline composing direction, and a pair of guides on which said slide ismounted for movement of said film holder in a direction transverse tosaid line composing direction.
 3. Photo-composing machine according toclaim 1 including a plurality of rectangular matrices each beingprovided with two replaceably attachable matrix centering pins and eachmatrix having more than one character thereon and, in addition to thecharacters, the assigned set width values for the characters in the formof machine readable marks.
 4. Photo-composing machine according to claim3, including a magazine support for said matrices, and a characterprinting apparatus coupled to said magazine support so that as saidmagazine support is moved to bring a selected character to aphotographic position the character printing apparatus is actuated tobring the same character to a printing position, and means for printinga character when the corresponding character is photographed, whereby arecord can be made of the characters photographed.
 5. Photo-composingmachine as claimed in claim 4, characterized in that the characterprinting apparatus includes an index wheel fitted with rubber typesarranged around the periphery of said wheel, an ink roller for inkingthe rubber types, and means for pressing a paper strip against the indexwheel.
 6. Photo-composing machine as claimed in claim 5, characterizedin that the index wheel is provided with a plurality of rubber types foreach letter, said types being arranged axially next to each other andeach such type being in a different style of the same letter, e.g. romanand italic, and including means for sliding said index wheel in an axialdirection so that for each rotary position of the wheel a letter can beprinted in the letter style desired.
 7. A photocomposing machineaccording to claim 1, including a slide on which said film holder ismounted for movement in a line composing direction, said slide beingmovable in a direction transverse thereto for moving said film holder insaid transverse direction, characterized in that said film holder can bemechanically driven for a horizontal line drawing operation and thatsaid slide can be mechanically driven for a vertical line drawingoperation, and including first motor means for driving said film holder,second motor means for driving said slide, a first test head connectedwith said film holder, a second test head connected with said slide,each test head adapted to receive a stencil of opaque and transparentsections for controlling the extent of line drawing in the machine, ashutter, electro-mechanical means for controlling said shutter, andmeans for optically scanning a stencil placed in a test head as the filmholder or the slide is driven and for energizing said electro-mechanicalmeans to open said shutter when a transparent section of the stencil isscanned and for closing said shutter when an opaque section of thestencil is scanned.
 8. Photo-composing machine as claimed in claim 7,characterized in that a light-sensitive element and a light sourceoppose each other in each test head, between which the stencil withtransparent and opaque sections is arranged.
 9. Photo-composing machineas claimed in claim 8, characterized in that said second ruler and thetest head for said slide are arranged on a common second slide which ismovable on a guide rail arranged in parallel with the guide bars forsaid sliDe.
 10. A photocomposing machine according to claim 3 in whichthe mechanically readable marks represent the relative set width valuesof the characters, and including point size setting means formechanically adjusting the electro-mechanical means for moving said filmholder in accordance with the point size to be photographed.